Laser cutting equipment

Abstract

The utility model relates to laser cutting equipment which comprises an equipment rack, a marble platform, a laser device, a laser cutting head, a first driving assembly and two second driving assemblies, the marble platform is arranged on the equipment rack, and two marble gantry seats are arranged on the marble platform at intervals in the x direction; the second driving assemblies are installed on the marble gantry base in a one-to-one correspondence mode, the first driving assembly is erected on the two second driving assemblies so that the two second driving assemblies can drive the two ends of the first driving assembly to synchronously move in the y direction, and the laser cutting head is installed on the first driving assembly and driven by the first driving assembly to move in the x direction. The laser cutting head is located on the light path of laser emitted by the laser device, and a cutting station is arranged between the two marble gantry seats and located within the working range of the laser cutting head. The laser cutting device solves the problem that an existing laser cutting device is low in machining precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser cutting technical field especially relates to a laser cutting equipment. BACKGROUND

[0002] When there is a large size high-precision cutting demand, the motion shaft of the existing swing head type three-dimensional five-axis laser cutting equipment is driven by a servo motor, and after the error is superimposed, the overall precision cannot meet the cutting demand of 3C shell shape; the three-dimensional five-axis equipment of cradle type cannot meet part of multi-position cutting demand due to the occupation of certain space by the cradle, and needs to be completed in multiple times. There is multiple clamping, which also affects the machining precision. SUMMARY

[0003] The utility model discloses a laser cutting equipment, which aims to solve the problem of low machining precision of the existing laser cutting equipment.

[0004] To achieve the above-mentioned purpose, the utility model provides a laser cutting equipment, which comprises an equipment rack, a marble platform, a laser, a laser cutting head, a first driving assembly and two second driving assemblies, the marble platform is arranged on the equipment rack, two marble gantry seats are arranged on the marble platform at intervals in the x direction, each second driving assembly is installed on the marble gantry seat one by one, the first driving assembly is arranged on the two second driving assemblies, so that the two second driving assemblies drive the two ends of the first driving assembly to move synchronously in the y direction, the laser cutting head is installed on the first driving assembly and is driven by the first driving assembly to move in the x direction, the laser cutting head is on the light path of the laser emitted by the laser, a cutting station is arranged between the two marble gantry seats, and the cutting station is in the working range of the laser cutting head.

[0005] According to some embodiments of the utility model, the third driving assembly can be driven to move in the x direction by the first driving assembly, the laser cutting head is installed on the first driving assembly through the third driving assembly, and the laser cutting head is driven to move in the z direction by the third driving assembly.

[0006] According to some embodiments of the utility model, the third driving assembly comprises a driving part, a movable part and a mounting seat fixed on the first driving assembly, the laser cutting head is installed on the movable part, the movable part is provided with a guide rail extending in the z direction, the mounting seat is provided with a sliding block, and the driving part can drive the sliding block to move on the guide rail, so that the movable part moves in the z direction relative to the mounting seat and drives the laser cutting head to move in the z direction.

[0007] According to some embodiments of the utility model, the laser cutting head includes a first rotation assembly, a second rotation assembly and a cutting assembly, the first rotation assembly is connected with the second rotation assembly and drives the second rotation assembly to rotate around a first axis, the second rotation assembly is connected with the cutting assembly and drives the cutting assembly to rotate around a second axis, the first axis and the second axis are perpendicular to each other.

[0008] According to some embodiments of the utility model, a first light channel is formed in the first rotation assembly, a second light channel is formed in the second rotation assembly, and a third light channel is formed in the cutting assembly, the first light channel communicates with the second light channel and the third light channel through the second light channel, the laser cutting head further includes a first light path reflection assembly and two second light path reflection assemblies, the first light path reflection assembly is connected with the mounting seat, the first light path reflection assembly is arranged at one end of the first light channel away from the second light channel and is located on the light path of the laser.

[0009] According to some embodiments of the utility model, the angle adjusting mechanism includes a mirror frame and three adjusting screws, the mirror frame is arranged on the first rotation assembly or the cutting assembly, one corner of the mirror is movably connected to the mirror frame, the three adjusting screws are arranged at the other three corner positions of the mirror, each adjusting screw is connected with one of the mirror frame and the mirror and is connected with the other through a thread.

[0010] According to some embodiments of the utility model, the angle adjusting mechanism further includes a plurality of tension springs, each tension spring is arranged at intervals along the circumference of the mirror, one end of each tension spring is connected to the mirror, and the other end of each tension spring is connected to the mirror frame, the mirror frame is provided with an opening corresponding to the other three corner positions of the mirror, each adjusting screw is threadedly connected with the mirror frame, and the abutting end of the adjusting screw abuts against the mirror through the opening.

[0011] According to some embodiments of the utility model, the laser cutting head further includes a protective cover, one end of the protective cover is connected with the first light path reflection assembly, and the other end of the protective cover is connected with the first rotation assembly, the protective cover is telescopically arranged in the z direction, and the first light channel extends into the protective cover.

[0012] According to some embodiments of the present invention, the third drive assembly further includes a limiting part, which is disposed at the top of the movable part and has a limiting wall that can abut against the mounting base to restrict the downward movement of the movable part.

[0013] According to some embodiments of the present invention, an aluminum alloy base beam perpendicular to the two marble gantry seats is also included. The first drive assembly is mounted on the aluminum alloy base beam, and the two ends of the aluminum alloy base beam are respectively connected to the two second drive assemblies, so that the two second drive assemblies drive the two ends of the aluminum alloy base beam to move synchronously in the y direction, thereby driving the two ends of the first drive assembly to move synchronously in the y direction.

[0014] This utility model has at least the following beneficial effects:

[0015] In this invention, the part to be cut is placed on the cutting station, and the laser head outputs laser light emitted from the laser to perform the cutting operation. Since the marble platform and the two marble gantry bases are both made of marble, they are less prone to deformation and have better flatness compared to metal, which improves the walking accuracy of the laser cutting head. At the same time, by setting two second drive components to drive the two ends of the first drive component to move synchronously in the y direction, no torsional torque is generated. This improves the response speed and load capacity on the one hand, and the positioning accuracy of the laser cutting head on the other hand, making the walking and positioning of the laser cutting head more precise in the x and y directions, thereby improving the processing accuracy of the laser cutting equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A front view of a laser cutting device provided in an embodiment of this utility model;

[0018] Figure 2 for Figure 1 Side view of a laser cutting machine;

[0019] Figure 3 for Figure 1 Top view of a laser cutting machine;

[0020] Figure 4 for Figure 1Structure diagram of the third driving assembly and the laser cutting head;

[0021] Figure 5 For Figure 3 Front view of the third driving assembly and the laser cutting head;

[0022] Figure 6 For Figure 4 Sectional view of A-A;

[0023] Figure 7 For Figure 3 Structure diagram of the first light path reflection assembly.

[0024] Explanation of reference signs:

[0025] 100-laser cutting device; 1-device rack; 11-height adjusting part; 2-marble platform; 21-marble gantry; 22-cutting station; 3-laser; 4-laser cutting head; 41-first rotating assembly; 411-first light channel; 412-first housing; 413-first hollow rotating platform; 414-rotating core shaft; 42-second rotating assembly; 421-second light channel; 422-second housing; 423-second hollow rotating platform; 424-motor; 43-cutting assembly; 431-third light channel; 432-focusing mirror; 433-cutting head; 44-first light path reflection assembly; 441-mirror; 442-angle adjusting mechanism; 4421-mirror frame; 4422-adjusting screw; 4423-tension spring; 45-second light path reflection assembly; 46-protection cover body; 47-flexible bellows; 5-first driving assembly; 51-first linear motor; 6-second driving assembly; 61-second linear motor; 62-protection chain; 7-third driving assembly; 71-driving part; 72-moving part; 721-guide rail; 73-mounting seat; 74-limiting part; 8-aluminum alloy bottom beam; 9-fourth light path reflection assembly. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0027] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications also change accordingly.

[0028] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0029] The utility model provides a kind of laser cutting equipment, Figure 1 The utility model provides a kind of laser cutting equipment.

[0030] As Figures 1 to 3 The utility model discloses a kind of laser cutting equipment 100, including equipment rack 1, marble platform 2, laser 3, laser cutting head 4, first drive component 5 and two second drive components 6, the marble platform 2 is located on the equipment rack 1, the marble platform 2 is spaced apart with two marble gantry 21 in x direction, each second drive component 6 is one-to-one corresponding installation on the marble gantry 21, the first drive component 5 is erected on two second drive components 6, so that the two second drive components 6 drive the two ends of the first drive component 5 in y direction Synchronous movement, the laser cutting head 4 is installed on the first drive component 5, and by the first drive component 5 drive in x direction movement, the laser cutting head 4 is in the light path of the laser 3 laser emission, two marble gantry 21 between layout has cutting station 22, the cutting station 22 is in the working range of the laser cutting head 4.

[0031] The utility model discloses, the cutting component of waiting places in cutting position 22 is output from the laser 3 of laser cutting head 4 laser that shoots to carry out cutting operation, because marble platform 2 and two marble gantry 21 are all marble material quality, compared with metal material, not easy deformation and flatness is better, has improved the walking accuracy of laser cutting head 4, simultaneously through setting two second drive assembly 6 drive the both ends of first drive assembly 5 synchronous movement in y direction, no torsional moment is produced, on the one hand has improved response speed and load capacity, on the other hand has improved the positioning accuracy of laser cutting head 4, makes laser cutting head 4 walking positioning in x direction and y direction is more accurate, thereby has improved the machining accuracy of laser cutting equipment 100.

[0032] For different size and shape of cutting component of waiting, the cutting height that laser cutting head 4 needs to set is different, therefore in some embodiments, as shown in Figures 1 to 3 Laser cutting head 4 also includes third drive assembly 7 that can be driven by first drive assembly 5 and moves in x direction, laser cutting head 4 is installed on first drive assembly 5 through third drive assembly 7, and laser cutting head 4 is driven by third drive assembly 7 and moves in z direction. By driving laser cutting head 4 to move in z direction through third drive assembly 7, the cutting height of laser cutting head 4 is changed, so as to adapt to the cutting requirement of different size and shape of cutting component of waiting.

[0033] Specifically, as shown in Figure 3 First drive assembly 5 includes first linear motor 51 and first sliding block, first linear motor 51 can drive first sliding block to move in x direction, first sliding block is connected with third drive assembly 7 to drive third drive assembly 7 to move in x direction.

[0034] In order to further improve the walking accuracy of laser cutting head 4, in some embodiments, as shown in Figures 1 to 3As shown, the laser cutting device 100 further comprises an aluminum alloy bottom beam 8 perpendicular to the two marble gantries 21, the first driving assembly 5 is installed on the aluminum alloy bottom beam 8, and the two ends of the aluminum alloy bottom beam 8 are connected with the two second driving assemblies 6 respectively, so that the two second driving assemblies 6 drive the two ends of the aluminum alloy bottom beam 8 to move synchronously in the y direction, thereby driving the two ends of the first driving assembly 5 to move synchronously in the y direction. The aluminum alloy bottom beam 8 is installed perpendicular to the two marble gantries 21 and checked using a micrometer, and the cross section of the aluminum alloy bottom beam 8 is trapezoidal, which is narrow at the top and wide at the bottom, thereby improving the deformation resistance of the aluminum alloy bottom beam 8 and the walking accuracy of the first driving assembly 5, and thus improving the walking accuracy of the laser cutting head 4. Meanwhile, the side of the aluminum alloy bottom beam 8 is processed with a round hole to reduce weight, thereby reducing the load of the second driving assembly 6.

[0035] Specifically, as shown in Figure 2 The second driving assembly 6 comprises a second linear motor 61 and a second sliding block, the second linear motor 61 can drive the second sliding block to move in the y direction, and the two second sliding blocks are connected with the two ends of the aluminum alloy bottom beam 8 respectively, so as to drive the two ends of the aluminum alloy bottom beam 8 to move synchronously in the y direction, and drive the two ends of the first driving assembly 5 to move synchronously in the y direction.

[0036] As shown in Figure 2 and Figure 3 The cables of the first linear motor 51 and the two second linear motors 61 are externally sleeved with a protective chain 62 to protect the cables of the linear motors and avoid damage caused by scratches.

[0037] Since the marble platform 2 needs to be kept horizontal, preferably, in some embodiments, as shown in Figure 1 The four corners of the device rack 1 are provided with height adjusting parts 11, and the horizontal degree of the marble platform 2 is adjusted by cooperation of the four height adjusting parts 11.

[0038] The specific structure of the third driving assembly 7 is not limited, as long as the third driving assembly 75 can drive the laser cutting head 4 to move in the z direction, for example, in some embodiments, as shown in Figure 4As shown, the third driving assembly 7 comprises a driving part 71, a movable part 72, and a mounting base 73 fixed on the first driving assembly 5, the laser cutting head 4 is mounted on the movable part 72, the movable part 72 is provided with a guide rail 721 extending in the z direction, the mounting base 73 is provided with a sliding block, the driving part 71 can drive the sliding block to move on the guide rail 721, so that the movable part 72 moves in the z direction relative to the mounting base 73, and drives the laser cutting head 4 to move in the z direction. By arranging the guide rail 721 on the movable part 72 and arranging the sliding block on the mounting base 73, the guide rail 721 moves with the movable part 72 and does not interfere with the positioning tool on the cutting station 22 below the mounting base 73 and the to-be-cut part, so that the laser cutting head 4 can be adapted to larger size to-be-cut parts, and the applicability of the laser cutting head 4 is improved.

[0039] Specifically, the driving part 71 is a linear motor with a brake function, which can realize self-locking function when the driving part 71 stops running.

[0040] Further, in some embodiments, as Figure 4 As shown, the mounting base 73 is arranged in a ring shape, and the movable part 72 is movably arranged in the mounting base 73. In this way, since the laser cutting head 4 is connected with the movable part 72, when the movable part 72 moves upward excessively, the laser cutting head 4 will abut against the bottom of the mounting base 73, which serves as a limiting function to prevent the movable part 72 from being disconnected from the mounting base 73.

[0041] Similarly, in some embodiments, as Figure 4 As shown, the third driving assembly 7 further comprises a limiting part 74, the limiting part 74 is arranged on the top of the movable part 72, and the limiting part 74 has a limiting wall which can abut against the top of the mounting base 73 to limit the downward movement of the movable part 72. In this way, the limiting part 74 can limit the downward movement of the movable part 72 by abutting against the top of the mounting base 73, so as to prevent the movable part 72 from moving downward excessively, which may cause the laser cutting head 4 to collide with the to-be-cut part and be damaged.

[0042] In order to adapt to the cutting requirements of to-be-cut parts of different shapes, in some embodiments, as Figure 5 and Figure 6As shown, the laser cutting head 4 comprises a first rotating assembly 41, a second rotating assembly 42 and a cutting assembly 43, the first rotating assembly 41 is connected with the second rotating assembly 42 and drives the second rotating assembly 42 to rotate around a first axis, the second rotating assembly 42 is connected with the cutting assembly 43 and drives the cutting assembly 43 to rotate around a second axis, and the first axis and the second axis are perpendicular to each other. In this way, by driving the second rotating assembly 42 to rotate around the first axis through the first rotating assembly 41, and driving the cutting assembly 43 to rotate around the second axis through the second rotating assembly 42, the control of the central rotation and the normal rotation of the cutting assembly 43 is realized, so that the laser cutting head 4 can cut workpieces of various shapes, meet the cutting needs of components to be cut of different shapes, and thus improve the applicability of the laser cutting head 4.

[0043] Specifically, in some embodiments, as Figure 6 As shown, the first rotating assembly 41 comprises a first housing 412, a first hollow rotating platform 413 and a rotating core shaft 414, the rotating core shaft 414 is arranged in the first housing 412 and connected with one end of the first hollow rotating platform 413, the other end of the first hollow rotating platform 413 is connected with the second rotating assembly 42, and the rotating core shaft 414 can drive the first hollow rotating platform 413 to rotate around the first axis, so as to drive the second rotating assembly 42 to rotate synchronously around the first axis.

[0044] Similarly, as Figure 5 and Figure 6 As shown, the second rotating assembly 42 comprises a second housing 422, a second hollow rotating platform 423 and a motor 424, the motor 424 is arranged at one end of the second housing 422, one end of the second hollow rotating platform 423 is connected with the cutting assembly 43, and the other end is connected with the core shaft of the motor 424, and the motor 424 can drive the second hollow rotating platform 423 to rotate around the second axis, so as to drive the cutting assembly 43 to rotate synchronously around the second axis.

[0045] Since the motor 424 will rotate following the rotating core shaft 414, in order to avoid the cable of the motor 424 being scratched and damaged by the component to be cut in the active stroke, in some embodiments, as Figure 4 and Figure 5 As shown, the cable of the motor 424 is provided with a flexible bellows 47, one end of the flexible bellows 47 is connected with the first housing 412, and the other end is connected with the second housing 422, so as to protect the cable of the motor 424.

[0046] Since the light path of the laser needs to be kept in the center position when the cutting assembly 43 is controlled to rotate, in some embodiments, as shown in Figure 6 the first rotary assembly 41 is formed with a first light channel 411, the second rotary assembly 42 is formed with a second light channel 421, and the cutting assembly 43 is formed with a third light channel 431. The first light channel 411 communicates with the second light channel 421 and the third light channel 431. The laser cutting head 4 further comprises a first light path reflection assembly 44 and two second light path reflection assemblies 45. The first light path reflection assembly 44 is connected with the mounting seat 73 and is arranged at one end of the first light channel 411 away from the second light channel 421 and on the light path of the laser emitted by the laser 3. One of the second light path reflection assemblies 45 is arranged on the second rotary assembly 42 and at one end of the second light channel 421 close to the first light channel 411. The other second light path reflection assembly 45 is arranged on the cutting assembly 43 and at one end of the third light channel 431 close to the second light channel 421. Each of the light path reflection assemblies comprises a mirror 441 and an angle adjustment mechanism 442 for adjusting the deflection angle of the mirror 441. In this way, the deflection angle of the mirror 441 can be adjusted in real time by the angle adjustment mechanism 442, so as to change the reflected light path of the laser, so that the light path is always kept in the center position, thereby ensuring the effect of laser cutting.

[0047] Preferably, in some embodiments, as shown in Figure 6 the cutting assembly 43 comprises a focusing mirror 432 and a cutting head 433. The focusing mirror 432 is arranged on the third light channel 431, and the cutting head 433 is arranged at one end of the third light channel 431 away from the second light channel 421. The laser emitted by the laser 3 is focused by the focusing mirror 432, and the focused laser is output from the cutting head 433, thereby improving the cutting effect.

[0048] The specific structure of the angle adjustment mechanism 442 is not limited as long as it can adjust the deflection angle of the mirror 441. For example, in some embodiments, as shown in Figure 7As shown, the angle adjustment mechanism 442 comprises a mirror frame 4421 and three adjusting screws 4422, the mirror frame 4421 is arranged on the first rotary assembly 41 or the cutting assembly 43, one corner of the mirror 441 is movably connected to the mirror frame 4421, the three adjusting screws 4422 are arranged corresponding to the other three corners of the mirror 441, the mirror frame 4421 and the mirror 441, each of the adjusting screws 4422 is connected to one of the mirror frame 4421 and the mirror 441, and is threadedly connected to the other. In this way, by rotating the adjusting screws 4422, the distance between the corresponding corner of the mirror 441 and the mirror frame 4421 can be adjusted, and the four-way adjustment of the mirror 441 can be realized by the cooperation of the three adjusting screws 4422.

[0049] Further, in some embodiments, as Figure 7 As shown, the angle adjustment mechanism 442 further comprises a plurality of tension springs 4423, each of the tension springs 4423 is arranged along the circumference of the mirror 441, one end of each of the tension springs 4423 is connected to the mirror 441, and the other end is connected to the mirror frame 4421, the mirror frame 4421 is provided with openings corresponding to the other three corners of the mirror 441, each of the adjusting screws 4422 is threadedly connected to the mirror frame 4421, and the abutting end of the adjusting screw 4422 abuts against the mirror 441 through the opening. In this way, by pulling the mirror 441 with the plurality of tension springs 4423, the mirror 441 is prevented from being separated from the mirror frame 4421 during adjustment of the deflection angle, then by rotating each of the adjusting screws 4422 to make the abutting end thereof abut against the mirror 441, and continuing to rotate the adjusting screw 4422 to move the abutting end relative to the mirror frame 4421, the four-way adjustment of the mirror 441 can be realized.

[0050] Since the first rotary assembly 41 moves in the z direction under the drive of the third drive assembly 7, there is a large gap between the first light path reflection assembly 44 and the first rotary assembly 41, in order to prevent dust from entering the first rotary assembly 41 from the gap, in some embodiments, as Figure 7 As shown, the laser cutting head 4 further comprises a protective cover 46, one end of the protective cover 46 is connected to the first light path reflection assembly 44, and the other end is connected to the first rotary assembly 41, the protective cover 46 is arranged in an extendable and retractable manner in the z direction, and the first light channel 411 extends into the protective cover 46. By arranging the protective cover 46 between the first light path reflection assembly 44 and the first rotary assembly 41, the optical path is protected from dust pollution.

[0051] Specifically, as Figure 3As shown, the laser cutting device 100 further comprises a fourth light path reflection assembly 9, which is located on the light path of the laser 3 emitting laser and can reflect the laser to the first light path reflection assembly 44, and a protective cover 46 which can be telescoped in the y direction is arranged between the laser 3 and the fourth light path reflection assembly 9, and a protective cover 46 which can be telescoped in the x direction is arranged between the fourth light path reflection assembly 9 and the first light path reflection assembly 44, so as to protect the light path from being polluted by dust.

[0052] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser cutting apparatus, characterized by, The device rack, a marble platform, a laser, a laser cutting head, a first driving assembly and two second driving assemblies, the marble platform is arranged on the device rack, the marble platform is provided with two marble gantries in the x direction, each second driving assembly is installed on the marble gantry, the first driving assembly is arranged on the two second driving assemblies, and the two ends of the first driving assembly are driven to move synchronously in the y direction by the two second driving assemblies, the laser cutting head is installed on the first driving assembly and is driven to move in the x direction by the first driving assembly, the laser cutting head is in the light path of the laser emitted by the laser, and a cutting station is arranged between the two marble gantries, and the cutting station is in the working range of the laser cutting head.

2. The laser cutting apparatus of claim 1, wherein, The third driving assembly is further arranged and can be driven to move in the x direction by the first driving assembly, the laser cutting head is installed on the first driving assembly through the third driving assembly, and the laser cutting head is driven to move in the z direction by the third driving assembly.

3. The laser cutting apparatus of claim 2, wherein, The third driving assembly comprises a driving part, a movable part and a mounting seat fixed on the first driving assembly, the laser cutting head is installed on the movable part, the movable part is provided with a guide rail extending in the z direction, the mounting seat is provided with a sliding block, and the driving part can drive the sliding block to move on the guide rail, so that the movable part moves relative to the mounting seat in the z direction, and drives the laser cutting head to move in the z direction.

4. The laser cutting apparatus of claim 3, wherein, The laser cutting head comprises a first rotating assembly, a second rotating assembly and a cutting assembly, the first rotating assembly is connected with the second rotating assembly and drives the second rotating assembly to rotate around a first axis, the second rotating assembly is connected with the cutting assembly and drives the cutting assembly to rotate around a second axis, and the first axis and the second axis are perpendicular to each other.

5. The laser cutting apparatus of claim 4, wherein, The first rotating assembly is formed with a first light channel, the second rotating assembly is formed with a second light channel, the cutting assembly is formed with a third light channel, the first light channel communicates with the second light channel and the third light channel, the laser cutting head further comprises a first light path reflection assembly and two second light path reflection assemblies, the first light path reflection assembly is connected with the mounting seat, the first light path reflection assembly is arranged at one end of the first light channel away from the second light channel and is located in the light path of the laser emitted by the laser, one of the second light path reflection assemblies is arranged on the second rotating assembly and is located at one end of the second light channel close to the first light channel, and the other second light path reflection assembly is arranged on the cutting assembly and is located at one end of the third light channel close to the second light channel, and each light path reflection assembly comprises a reflector and an angle adjusting mechanism for adjusting the deflection angle of the reflector.

6. The laser cutting apparatus of claim 5, wherein, The angle adjusting mechanism comprises a mirror frame and three adjusting screws, the mirror frame is arranged on the first rotating assembly or the cutting assembly, one corner of the mirror is movably connected to the mirror frame, and the three adjusting screws are arranged at the other three corner positions of the mirror respectively, each adjusting screw is connected to one of the mirror frame and the mirror and is threadedly connected to the other one.

7. The laser cutting apparatus of claim 6, wherein, The angle adjusting mechanism further comprises a plurality of tension springs, each tension spring is arranged at a circumferential position of the mirror, one end of each tension spring is connected to the mirror, and the other end is connected to the mirror frame, the mirror frame is provided with an opening corresponding to the other three corner positions of the mirror, each adjusting screw is threadedly connected to the mirror frame, and the abutting end of the adjusting screw abuts against the mirror through the opening.

8. The laser cutting apparatus of claim 5, wherein, The laser cutting head further comprises a protective cover, one end of the protective cover is connected to the first light path reflecting assembly, and the other end is connected to the first rotating assembly, the protective cover is arranged in an extendable and retractable manner in the z direction, and the first light channel extends into the protective cover.

9. The laser cutting apparatus of claim 3, wherein, The third driving assembly further comprises a limiting portion arranged at the top of the movable portion, and the limiting portion has a limiting wall capable of abutting against the mounting seat to limit downward movement of the movable portion.

10. The laser cutting apparatus of claim 1, wherein, The marble gantry is further provided with an aluminum alloy bottom beam perpendicular to the two marble gantries, the first driving assembly is arranged on the aluminum alloy bottom beam, and the two ends of the aluminum alloy bottom beam are respectively connected to the two second driving assemblies, so that the two second driving assemblies drive the two ends of the aluminum alloy bottom beam to move synchronously in the y direction, thereby driving the two ends of the first driving assembly to move synchronously in the y direction.

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